Selection of Extruder Screw Material

1. Extruder screw

The extruder screw is the key component of the extruder. The performance of the screw determines the productivity, plasticizing quality, dispersion of additives, melt temperature and power consumption of an extruder and can directly affect its scope of application and production efficiency. Through the rotation of the screw, the plastic can be squeezed, and the plastic can move, pressurize, and obtain some heat from friction in the barrel. The plastic is mixed and plasticized in the process of moving in the barrel. As there are many types of plastics, their properties are also different. Therefore, in order to adapt to different plastic processing needs, the extruder screw types and structures required are both different in actual operation,so as to maximize the efficiency of plastic transportation, extrusion, mixing and plasticization.


2. Selection of the extruder screw material

The material of the extruder screw elements must have the characteristics of high temperature resistance, wear resistance, corrosion resistance and high strength, and should also have those of good cutting performance, small residual stress after heat treatment, and small thermal deformation.


For the material of the extruder screw, there are specific requirements as follows:

(1) High mechanical properties. It must have sufficient strength to adapt to high-temperature and high-pressure working conditions and increase the service life.


(2) Good mechanical processing performance. It must have better cutting performance and heat treatment performance.


(3) Excellent corrosion and abrasion resistance.

  • Advantages of Twin Screw Extruder

    Advantages of Twin Screw Extruder

    May 7, 2021Ⅰ. Application of twin screw extruderPlastic blending and modification granulation is mostly done by extruders, which are mainly divided into single screw and twin screw. With the continuous optimiza...view
  • Conditions and Methods of Use of Extruder Screw Barrel

    Conditions and Methods of Use of Extruder Screw Barrel

    January 15, 20211. Heating method of extruder screw barrelThe machine heater widely uses resistance heating, and uses thermocouples to realize segmented temperature control and detection. The resistance heating uses ...view
  • Method of Protecting Screw and Barrel

    Method of Protecting Screw and Barrel

    January 15, 2021Corrosive, abrasive and high temperature resistant resins may unknowingly damage the screw and barrel. For example, some engineering materials, thermoplastic elastomers, and biopolymer materials somet...view
  • Maintenance of the Twin Screw Extruder

    Maintenance of the Twin Screw Extruder

    June 8, 2021In order to ensure the safe and stable production of the twin screw extruder and prolong its service life, the maintenance of the twin screw extruder must be strengthened. The basic contents are as fo...view
top Inquiry